12609287 has 4 divisors (see below), whose sum is σ = 13044120. Its totient is φ = 12174456.

The previous prime is 12609271. The next prime is 12609319. The reversal of 12609287 is 78290621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78290621 = 19 ⋅4120559.

It is a cyclic number.

It is not a de Polignac number, because 12609287 - 2⁴ = 12609271 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12609227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217373 + ... + 217430.

It is an arithmetic number, because the mean of its divisors is an integer number (3261030).

Almost surely, 2^12609287 is an apocalyptic number.

12609287 is a deficient number, since it is larger than the sum of its proper divisors (434833).

12609287 is an equidigital number, since it uses as much as digits as its factorization.

12609287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434832.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 12609287 is about 3550.9557868270. The cubic root of 12609287 is about 232.7538338465.

The spelling of 12609287 in words is "twelve million, six hundred nine thousand, two hundred eighty-seven".